%0 Journal Article %A S. K. Godunov %A A. N. Malyshev %T On a special basis of approximate eigenvectors with local supports for an isolated narrow cluster of eigenvalues of a symmetric tridiagonal matrix %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 2008 %P 1156-1166 %V 48 %N 7 %U http://geodesic.mathdoc.fr/item/ZVMMF_2008_48_7_a1/ %G ru %F ZVMMF_2008_48_7_a1